SAN DIEGO (AP) - Nick Johnson scored 18 points, Aaron Gordon added 16 and top-seeded Arizona overcame a shaky start and a late run by Weber State to beat the Wildcats 68-59 in the NCAA tournament's West Regional on Friday.

Arizona will open its 31st NCAA Tournament, and third under head coach Sean Miller, on Friday when it faces Big Sky champion Weber State at 11:10 a.m. MST; UA is a No. 1 seed for the sixth time in program history and the first since 2003.

Making its third appearance in the Pac-12 Tournament final in the last five years, fourth-ranked Arizona will face UCLA on Saturday at 3 p.m. MST in search of its first Pac-12 Tournament championship under head coach Sean Miller.

After winning its 13th regular-season Pac-12 title and posting its best league record since the 2004-05 season, fourth-ranked Arizona will continue its quest for its fifth Pac-12 Tournament title on Friday when it faces Colorado at 6 p.m. MST.